Careful Words

leaven (n.)

leaven (v.)

  A little leaven leaveneth the whole lump.

New Testament: Galatians v. 9.

Sweet Mercy! to the gates of heaven

This minstrel lead, his sins forgiven;

The rueful conflict, the heart riven

With vain endeavour,

And memory of Earth's bitter leaven

Effaced forever.

William Wordsworth (1770-1850): Thoughts suggested on the Banks of the Nith.